What RPM should I be propping to for at WOT?
What RPM should I be propping to for at WOT?
6000-6200, In the heat of summer if you can do 6000 you will be OK and gain 200 RPM in winter, that of course will vary with different boats.
2018 Z521L 250 PRO XS V8
Thanks, I have a new 2019 Z520L with less than 16 hours, running a Fury 23P three blade. Haven't taken the time to tune the PTP and prop. But, I believe it is close. Factory had the P2P really low, I have raised about 3/4" of an inch from factory (approx 5" P2P is where Ranger had it).
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Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
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2B688510 2020 225 pro xs. Im running a 23p fury on my z519. Today I could only get to 5800 RPMs. Water temp 90 degrees air temp 90 as well. Is this normal for summer? Boat was running 70-71 at 5800. Also what should the operating temperatures be on these motors? My vessel view mobile was showing 138-140 degrees. There is another temperature on there as well that was around 240-260 degrees. I think this is the exhaust temperature? Are these normal?
Last edited by Firecat; 07-25-2020 at 02:50 PM.
Was likely oil temp- and yes, those are normal. It's normal with these temps to be down about 200 RPM's over what you would get in the cooler months.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Thanks Don!
The overall performance of your rig will be maximized when you get the V8 to 6200 rpms. Anything less and your leaving economy/speed/performance attributes on the table for something you just shelled out big $ for.
My Z21 rig, with a now 2 year old V8, required a true pitched 23 three blade Fury for summer and a 24 for winter to maintain the 6200 rpms.
2022 Ranger Z520R, 2022 Mercury 250 ProXS 4s
Dual 16” Lowrance Live’s at console, 12” Live with Active Target, Garmin 8612 and Livescope, and Humminbird 12” Mega 360 at the bow
Lowrance Ghost TM
Given the Fury's pitch is on the high side of the number... it's probably closer to 5% (but still quite respectable for this time of year).
Mike is correct- if you want to get the "best" performance from your engine consider getting another (lower pitch) prop for use in the warmer months (such as a 22P).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor